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explain plan explain plan for sql_statement select * from table(dbms_xplan.display) |
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DBMS_XPLAN包 1.select * from table(dbms_xplan.display); 2.select * from table(dbms_xplan.display_cursor()); 3.select * from table(dbms_xplan.display_awr('sql_id')); |
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SQLPLUS的AUTOTRACE开关 set autotrace [on|off|traceonly] [explain] [statistics] 1.set autotrace on(包含执行结果、执行计划、统计信息) 2.set autotrace traceonly（包含执行计划、统计信息） 3.set autotrace explain(包含执行计划) 4.set autotrace statistics(包含统计信息) |
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10046事件与tkprof 1.当前session激活10046事件 oradebug setmypid alter session set events '10046 trace name context forever,level 12' orabug event 10046 trace name context forever,level 12 2.在此session执行SQL oradebug tracefile_name 3.在此session关闭10046事件 alter session set events '10046 trace name context off' orabug event 10046 trace name context off tkprof tracefile outputfile sql_trace 1.alter session set seq_trace=true; 2.执行SQL 3.alter session set sql_trace=false; 4.select distinct spid from v$process p,v$session s,v$mystat m where p.addr=s.paddr and s.sid=m.sid; 5.show parameter user_dump_dest |